{temp,systemd}/{mutter,gnome-shell}-mobile: re-enable riscv64

The bug referenced in the APKBUILDs is 3 years old and I cannot
reproduce it anymore when cross compiling from x86_64.

This syncs the enabled architectures with Alpine.

[ci:skip-vercheck]: enabling packages for arch

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7858>

extra-repos/systemd/gnome-shell-mobile/APKBUILD

@@ -8,8 +8,8 @@ pkgver=9999$_pkgver
 pkgrel=1
 pkgdesc="GNOME shell mobile"
 url="https://wiki.gnome.org/Projects/GnomeShell"
-# gjs / riscv64: mutter-mobile
-arch="all !armhf !s390x !riscv64"
+# armhf: mutter-mobile, gjs
+arch="all !armhf"
 license="GPL-2.0-or-later"
 depends="
 	accountsservice

extra-repos/systemd/mutter-mobile/APKBUILD

@@ -8,10 +8,8 @@ pkgver=9999$_pkgver
 pkgrel=0
 pkgdesc="clutter-based window manager and compositor"
 url="https://wiki.gnome.org/Projects/Mutter/"
-# ricsv64: doesn't build currently:
-# https://builds.sr.ht/~postmarketos/job/869829#task-pmbootstrap_build-1224
 # armhf: pmb#2618
-arch="all !riscv64 !armhf"
+arch="all !armhf"
 license="GPL-2.0-or-later"
 depends="
 	gnome-settings-daemon-mobile

temp/gnome-shell-mobile/APKBUILD

@@ -7,8 +7,8 @@ pkgver=48.0
 pkgrel=5
 pkgdesc="GNOME shell"
 url="https://wiki.gnome.org/Projects/GnomeShell"
-# gjs / riscv64: mutter-mobile
-arch="all !armhf !s390x !riscv64"
+# armhf: gjs -> mozjs
+arch="all !armhf"
 license="GPL-2.0-or-later"
 depends="
 	accountsservice

temp/mutter-mobile/APKBUILD

@@ -7,9 +7,7 @@ pkgver=48.0
 pkgrel=2
 pkgdesc="clutter-based window manager and compositor"
 url="https://wiki.gnome.org/Projects/Mutter/"
-# ricsv64: doesn't build currently:
-# https://builds.sr.ht/~postmarketos/job/869829#task-pmbootstrap_build-1224
-arch="all !riscv64"
+arch="all"
 license="GPL-2.0-or-later"
 depends="
 	gnome-settings-daemon-mobile